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Oracle Data Guard 11gR2 Administration : Beginner's Guide

You're reading from   Oracle Data Guard 11gR2 Administration : Beginner's Guide If you're an Oracle Database Administrator it's almost essential to know how to protect and preserve your data. This is the perfect primer to Data Guard that covers all the bases with a totally practical, user-friendly approach.

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Product type Paperback
Published in Jun 2013
Publisher Packt
ISBN-13 9781849687904
Length 404 pages
Edition 1st Edition
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Toc

Table of Contents (19) Chapters Close

Oracle Data Guard 11gR2 Administration Beginner's Guide
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Pop Quiz Answers
1. Getting Started FREE CHAPTER 2. Configuring the Oracle Data Guard Physical Standby Database 3. Configuring Oracle Data Guard Logical Standby Database 4. Oracle Data Guard Broker 5. Data Guard Protection Modes 6. Data Guard Role Transitions 7. Active Data Guard, Snapshot Standby, and Advanced Techniques 8. Integrating Data Guard with the Complete Oracle Environment 9. Data Guard Configuration Patching 10. Common Data Guard Issues 11. Data Guard Best Practices Index

Corruption detection, prevention, and automatic repair with Oracle Data Guard


Corruption in an Oracle database block means that a block doesn't contain the data that the database expects to find. This can be caused by various failures in the hardware environment, including disks, disk controllers, memory or network components or software errors in the operating system, firmware, the volume manager, and the Oracle database software itself.

Oracle offers some initialization parameters to control the level of corruption prevention and detection. Of course, a higher level brings performance issues with it. In a Data Guard configuration, using the standby database for corruption detection and prevention will bring higher data protection and availability with less performance effect on the primary database.

Let's first start with learning the three types of block corruption in Oracle databases.

  • Physical block corruption: In a physically corrupted database block, the block header may be corrupted...

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